答案1
这是一个电子邮件地址,可用于联系域的负责人。电子邮件地址必须转换为主机名,如 RFC 1035 中所述:
The DNS encodes the <local-part> as a single label, and encodes the
<mail-domain> as a domain name. The single label from the <local-part>
is prefaced to the domain name from <mail-domain> to form the domain
name corresponding to the mailbox. Thus the mailbox HOSTMASTER@SRI-
NIC.ARPA is mapped into the domain name HOSTMASTER.SRI-NIC.ARPA. If the
<local-part> contains dots or other special characters, its
representation in a master file will require the use of backslash
quoting to ensure that the domain name is properly encoded. For
example, the mailbox [email protected] would be represented as
Action\.domains.ISI.EDU.
如果前面没有特殊字符,则@
只需将其替换@
为.